Compressor



March 6, 192s. l 1,661,433

T. J. LITLE, JR

COMPRESSOR Filed July 19, 1925 @0M/15 L/TLE Jia Patented Mar. 6, 1928.

UNITED STATES 1,661,433 PATENT OFFICE.

THOMAS 3'. LITLE, JR., 0F DETROIT, MICHIGAN, ASSIGNOR TO COPELAND PRODUCTS, INC., OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

COMPRESSOR.

Application led July 19,

The primary object of my invention is to provide a compressor for use 1n refrigerating systems which can be mounted upon a motor and operated directly by the shaft of o the motor. y l

Another object of my invention is to provide a compressor for use in refrigerating systems, and particularly for those systems which are installed in domestic refrigerators, which will materially reduce the amount of space how required for the installation of domestic refrigerating systems. A

With these and other objects in View, my invention consistsV in the arrangement, combination and construction of the various parts of my improved device, as described 1n the specification, claimed in my claims and shown in the accompanying drawing, in which:

Fig. l is a side elevation of a motor, showing in section, my invention attached thereto.

Fig. 2 is a sectional view of the rear portion of the piston employed in my improved device.

l have shown an electric motor l having an armature shaft 2 connected therewith, a cylinder 3 having an aperturcd ange i on the bottom thereof, secured to the motor l by the bolts 24 inserted through the flanges so l. Within the cylinder 3 is a piston 5 having an irregular groove 6 cut around its inner surface, and having a longitudinal flange l formed in its outer surface adjacent its rear end. Rings 8 are positioned in grooves 9 adjacent the head of the piston 5. The cylinder 3 has a longitudinal groove l0 cut in its inner surface near its lower end for sliding engagement with the flange 7 onl piston 5. An inlet vent l1 is formed in the head of cylinder 3 and contains an inward opening valve l2. An outlet vent. i3 is also formed in the head of cylinder 3 and contains an outward opening valve 14. A coil spring 2O is positioned in vent ll to bear outwardly against valve l2'and to normally hold it securely over the end of pipe l which is fitted in vent ll, and a coil spring 21 is positioned in vent 13 to bear inwardly against valve 14 to normally hold it securely over the reduced portion of vent 13.

An intake pipe vl5 is fitted in intake vent il and an outlet pipe 16 is fitted in the outlet vent 13. A plurality of annular anges i7 are formed on the outer surface of cylinder lll 3 to facilitate the radiation of heat gener-1.

1926. Serial No. 123,445.

ated by the operation of the piston 5. The shaft 2. which is operatively connected with the motor 1, and which extends into the piston 5, has a stud 18 positioned therein which is adapted to engage and move through the irregular groove 6. The piston 5 serves as the sole support for the left hand end of the shaft 2 as viewed in Fig. l.

When the shaft 2 is rotated by the motor l stud 18 engaging and moving through the irregular groove 6 in piston 5 will cause the piston 5 to move backward and forward in cylinder 3. The backward movement of piston 5 will lift valve 12 from its seat on the end of pipe l5 and draw gaseous refrigerant 70 from the expansion chamber of a refrigerating system, (not shown) through pipe 15 and vent l1 into cylinder 3. 'llhzv forward stroke of piston 5 will compress the aseous refrigerant drawn into cylinder 3 y the backward stroke, and will lift valve 14 and will force the compressed refrigerant through the vent 13 and the pipe i6 to the condenser of the refrigerating system (not shown). rThe flange 7, moving in the groove 10, will prevent the piston 5 from turning inthe cylinder 3.

lt will be obvious that various changes may be made in the arrangement, combination and construction of the various parts of my improved device, without departing from the spirit of my invention, and it is my intention to cover by my claims such changes as may be reasonably included within the scope thereof. i

What I claim is:

l. ln combination, an electric motor, a cylinder rigidly secured to one end thereof in axial alignment therewith and forming` an end wall therefor, a piston slidahly received within said cylinder rotatably receiving an end of the shaft of said motor within the interior thereof, a meandering endless lgroove in the interior walls of said piston, a

10 inder secured `to one endl thereof iii axial alignmenttherewith, e piston sliolehly receivecl in seid cylinder ariel helcl agoiriel; rotation therein, one enel ol: the armature shaft of Said motor being rotatably receiveol in seid piston and being solely supported thereby, am irregular groove im 'the interior Wall 'of seid piston, emol o, proj eetiori on soiol engaging saiol groove whereby roizoitioo o1? saldi shell causes reeiprocalbiori or? seid pia-allori.

THMAS el. Lll'lLE, 

